Drilling apparatus



NOiIV.. 5, A PAGET DRILLING APPARATUS Nov. 5, 1946. W, W. PAGET .z'AwAss DRILLING APPARATUS Filed Jan. 9, 1945 5 sheets-Sheet 2 amy. l

Nov. 5, 1946, s W. w. PAGET l 2,410,453

DRILLING APPARATUS Filed Jan, 9, 1945 5 sheets-sheet 4 Patented Nov. j, 1946 DRILLING APPARATUS Win W. Paget, Michigan City, Ind., assignor to Joy Manufacturing Company, a corporation of Pennsylvania Application Ilanuary 9, 1945, Serial No. 571,985

8 Claims.

My invention relates to drilling apparatus, and more particularly to control means for drilling apparatus vof the rotary type.

vAn object of my invention is to provide an improved drilling apparatus. Another object is to provide a drilling vapparatus having improved control means. Still another object is to provide a drilling apparatus having control means arranged in an improved manner whereby ready access may be had for repair or replacement of parts. Yet another object is to provide for a drilling apparatus of the rotary type, improved means for controlling drill feed in response to the torque on the drill rotating means. These and other objects will appearmore fully in the following description.

There is shown in the accompanying drawings one form which my kinvention may assume in practice.

In these drawings:

Fig. 1 is a side elevational View `of a drilling apparatus having -my improvements incorporated therein.

Fig. 2 is an enlarged longitudinal sectional View ofthe Supporting and feeding means for the drilling apparatus shown in Fig. l.

Fig. 3 is an enlarged longitudinal sectional View showing the control means, and portions of jthe drill rotating means and supporting and feeding means therefor.

Fig. 4 is an enlarged sectional view showing the controls for the drill rotating means, and taken on the plane of the line ll-Ll of Fig. 1G.

Fig. 5 is a fragmentary sectional View taken on the plane of the line 5-5 of Fig. 3.

Fig. 6 is a horizontal sectional view taken on the plane of the line 6-6 of Fig. 3.

Fig. '7 is a cross-sectional view taken substantially on the planes of the line l-l of Fig. 3.

Fig. 8 is a sectional view taken on the plane of the line 8 8 of Fig. '7.

Fig. 9 is a fragmentary sectional view taken on the planes of the line 9 9 of Fig. 13.

Fig. 10 is a side elevational View with parts broken away to show the forward feed passages and control `means for the drilling apparatus.

Fig. 11 is a fragmentary sectional View vtaken on the plane ofthe line ll-H of Fig.

Fig. 12 is a fragmentary .sectional view taken Von the plane of the line l2-l2 of Fig. '7.

Fig. A13 isa sectional view taken on the Aplanes of the line I3'-I3 of Fig. 9.

Fig. 14 is a sectional view showing the control means and passages for supplying cleansing liquid y.to the drill bit.

(Cl. Z55- 45) Fig. 15 is a fragmentary cross-sectional View ltaken on the plane of the line .i5-l5 of Fig. 14.

Fig. 16 is a cross-sectional View taken on the plane of the line l-l of Fig. 3.

In the illustrative embodiment of my invention there is shown a drilling apparatus comprising bit rotating means, generally designated I, supporting and guiding means, generally designated 2, and bit feeding means, generally designated 3.

rhe bit rotating meansv l comprises a rotary motor 4, herein a high speed electric motor having a motor casing A.-'i containing a rotor E keyed to a shaft i journaled in ball bearings 8 suitably supported within the motor casing. Carried by the motor shaft l is a chuck 9 for receiving the shank of a tubular shaped drill rod ill, the latter in turn carrying a drill bit Il. The motor is provided with a rear head I3 which has a rearward cylindric projection hl mounted for limited rotation in ball bearings i5 supported within a bore formed in a supporting member it. The bearings are retained in the bore in the supporting member by means of a retaining ring i3 secured, as by screws I9, to the supporting member,

and the cylindric projection is held against axial displacement with respect to the bearings by means of an end plate 20 secured, as by screws 2l, to the projection I4. A dirt seal 22 is arranged within the supporting member and engages the exterior periphery of the end plate 253. A cylindric portion 24 is formed on the end plate and fits the bore in the cylindric projection lli of the rear motor head to prevent leakage between the parts. The purpose of the rotary mounting for the motor will be later explained.

The feeding means is of the fluid actuated type and comprises a feed cylinder 26 containing a reciprocable feed piston 2l having a hollow piston rod 2S extending forwardly through a front cylinder head 29 and connected, as `by Welding at 30, to a plate .3l which is connected to the supporting member i6. The feed piston comprises an inner member k3&2 having a flanged plate 33 secured, as by screws, to the rear end thereof. An annulus 34 is seated against a shoulder at the forward end of the inner member 32, .and an annulus 35 has a reduced portion abutting the flanged plate 33 and providing a space for receiving a bushing 36. Arranged between the annuli 34 and 35 are sealing rings 31 engaging the inner walls of the feed cylinder. Arranged within the feed cylinder between its ends is an annular plate 38 which is engageable by the piston 2l for limiting forward movement of .the latter. Surrounding the piston rod is a sealing ring 39 amd-15s which is held by a spring 40 in sealing engagement with the piston rod and a collar 4| so as toprevent any escape of pressure fluid from the feed cylinder at the forward side of the feed piston. Attached to the rear end of thefeed cylinder is a head 42 having a handle 43 by means of which the position of the drill may be changed.

The drill supporting and guiding means 2 comprises a trunnion member 44 having a swivel plate 45 adapted to be clamped in the saddle mounting of a mine column or any other suitable suppcrt. The trunnion member has a longitudinally extending bore 46 receiving a cylindric tube 41 which is fixed in depending portions 48 and 49 of a support member 50. The tube 41 extends rearwardly from the member 50 and has its rear end xed in a recess formed in a depending portion 5| of the cylinder head 42. The 'support member 50 has alined bores 53 and 54 receiving the feed cylinder 26 and supporting the latter in a position with its axis parallel to the axis of the tube 41. The tube 41 is swivelly mounted in the bore 55 of the trunnion member 44 so that the drilling apparatus may be swung to opposite sides of the support, and a plunger lock 56 is receivable in a locking aperture E1 formed in the trunnion member 44 for locking the support member 50 in its upright position. This plunger lockis guided within bores formed in the depending portion 48 of the support member, and a coil spring 58 constantly urges the plunger lock toward its innermost locking position. A handle 59 is secured to the plunger lock whereby the locking portion thereof may be manually released from the locking aperture against the tension of the coil spring 58. Connected to the plate 3| carried by the supporting member I9 is a tubular member 60 which is slidably receivable in the tube 41 for holding the supporting member against rotation relative to the feed cylinder.

Arranged at the lower side of the supporting member E8 are contro-l means, generally designated G5, for controlling the iiow of fluid under1 pressure to the feed piston 21, for controlling the floW of cleansing liquid to the drill bit and for controlling the supply of electric current to the motor Il. This control means comprises a control block 86 connected, as by bolts, to the supporting member B. Formed in the control block, as shown in Figs. 3 and '1, is a chamber 68 to which liquid is supplied under pressure from a supply conduit 69. The liquid passes through a lter 10 in the chamber 68 and is conducted to a passage 1| which extends through the control block to a valve chamber 12 containing a valve member 13. An operating handle 14 is provided, as shown in Fig. 6, for positioning the valve member 13 to control the ilow of liquid from the passage 1| to a passage 18 which opens into an annular groove 11 surrounding a bore 18 formed in the control block and opening through the forward side of the latter. Received within the bore 18 is a valve sleeve 19 to the interior of which liquid is supplied from the groove 11 through ports 88. Formed in the walls of the bore 18 at opposite sides of the groove 11 are annular grooves 82 and 83 which communicate with the interior of the sleeve 19 through ports 84 and 85. Slidably contained within the sleeve 19 is a valve member 86 having enlarged .portions 81 and 88 engaging the walls of the sleeve and providing between them an annular space 89 which is adapted to connect, in different positions of the valve member, the groove 11 in communication with the grooves 82 and 83. At the outer end of the bore 18 is an enlarged bore 90 intoV which the valve sleeve opens, and the bore 99 communicates, as shown in Fig. 3, with a discharge passage 9|. At the inner end of the bore 18 is a discharge chamber 92 into 'which the inner end of the sleeve 19 opens, and the chamber 92 is connected by a bore 93 and ports 93' in the valve member 86 with points at the interior of the sleeve 19 communieating continuously with the discharge passage 9|. When the valve member 86 is in the position shown in Figs. 3 and 6 liquid is supplied from the groove 11 through the ports 80, the annular space 89, and the ports to the groove 83, and the groove 82 is connected to discharge through the ports 84, the valve sleeve 19, the bore 98, and the discharge passageSl. The valve member is movable outwardly from the above position to connect the grooves 11 and 82 in communication with each other through the space 89, and to connect the groove 83 in communication with the discharge chamber 92.

For adjusting the position of the valve member 8B there is provided an element 94 threaded into the bore and having a bore 95 slidably receiving a stern 96 formed on the valve member. Rotatably supported on the element 94 is a collar 91 having an internal helical groove 98, and a pin |00 carried by the valve member has its end portions extending through slots |0| in Kthe element 94 and projecting into the groove 98. When the collar 91 is rotated relative to the element 94, the ends of the pin |00 will follow in the groove 98 and cause the valve member 86 to be moved longitudinally of the valve sleeve.

Forward feed of the drilling apparatus is obtained by supplying liquid under pressure to the rearward end of the feed piston 21 from the groove 82. As shown in Fig. l0, the groove 82 is connected by a passage l 04 to a bore |05 containing a torque controlled valve means, generally designated |06, which controls the flow of liquid from the passage |04 to a passage |08 opening through the control block 66 into a passage |09 formed in the supporting member i8. The passage |08 is connected by a passage I |8 in the plate 3| to a tubular member I2 which extends axially through the piston rod 28 and 4the feed piston into communication with the feed cylinder at .the rearward side of the feed piston. The space in the feed cylinder at the forward side of the feed piston is connected by ports H4 to .the space ||5 at the interior of the piston rod, and the space H5 is connected, as shown in Fig. 3, in communication with a passage ||6 opening through the plate 3| into a passage ||1 extending .through the supporting member |6 to a passage |8 formed in the control block 66 and opening into the groove 83.

When the valve member 86 is in the position connecting the grooves 82 and 83, respectively, in communication with the supply groove 'l1 and discharge chamber 92, liquid will be supplied to the groove 82 and will ilow from the latter through the passage |04, past the torque controlled valve |06, through the passages |08, |09 and ||0, and through the tubular member ||2 to the feed cylinder at the rear side of the reed piston. The space in Ithe feed cylinderv at` the forward side of the feed piston will be vented at the same time through theports I4, the space H5, the passages H6, ||1 and H8, the groove 83, and the discharge chamber. 92.` The liquid .act- -ing on the rear side of the'feed piston will cause forward feed of the drilling apparatus.: When the valve member 86 is in the position shownin the periphery of the motor casing.

3, vthe grooves 82 and 188 will be connected, respectively, in communication with the bore 90 and the supply groov'e 11. Liquid will besupplied at this time to the groove=83 and will ilow through passages H8, ||1 and H6, space H5, and ports ||4 to the feed cylinder at the forward side of the feed piston. The space in the feed cylinder at the rear side of the feed piston vwill be vented at the same time through the tubular -member i |2, the passages I I0, |09 and |00, past the torque controlled valve |00, through the passage |04, the groove 82, the ports 84,'and the valve sleeve`10 to the bore 90 and the discharge passage 9|. The pressure of the liquid acting on the forward side of the feed piston causes a rearward `feed'of the drilling apparatus. The torque controlled valve comprises a valve sleeve |20 fitting tightly within the bore |05, the latterextending transverselythrough the control block 66 adjacent its forward side, and formed in the valve sleeve are stepped bores |2| and |22 slidably receiving, respectively, a valve member |24 and its stem |25. Surrounding the adjacent portions of the valve member and its stem are spaces |21 and |28 communicating with each other and providing a seat |28 which is engageable by the valve member for cutting off communication between the spaces. The space |21 is connected, as shown in Fig. 13, by a port |30 with a space |3| `formed byl slabbing off a portion of the valve sleeve |20, and the space |3| communicates with the passage |08. The space |28 is connected by a port |33 with a space |34 formed by slabbing a portion of the valve sleeve as shown in Figs. 9 and 13. The

space|34 communicates with vthepassage |04. lSurrounding the valve stem are -sealing rings |35 for preventing leakage of liquid from the space |28 along the stem.- The opposite ends -of the bore are closed by plugs |31 and |38, the plug |31 providing a recess receiving a plunger |40 connected to the end of the valve stem. A spring |4| acts between the plug |31 and the plunger |40 for urging the valve member |24 away from the seat |29. An enlargement .|42 on the -valve stem is -engageable with the valvesleeve |20l 'for'limiting the opening movement of the valve member. The plug `|38 has a recess r|43 receiving the outer portion of the valve member |24, and this recess is connected by a groove |44 in the sleeve |20 to a passage |45 (Fig. 12) opening into the bore 90 which communicateswith the discharge passage 9|. Any liquid leaking along the valve member to the recess |43 is conducted `away to the discharge passage so that -it oers no'opposition to the opening movements ofthe valve member. The torque controlled valve |00 will be noted to be located -adjacent the periphery .of the motor casing; andthe enlargement |42 on the valve stem forms with an enlargement |41 on the stem an annular groove |48 which receivesv the end of a pin |40 carried by a blocks |50 attached, as shown'inv Fig. 11, to the lowerside 'of When the drilling apparatus is being fed in a forward direction and the load on the drill rotat- V ing motor is not excessive, lthe valve member |24 will be held by the spring |4| in its open position so that fluid supplied to the space |28 from the forward feedpassage |04 may pass to the space |21 from which it is conducted to the forward feed passage |08. The rear head of the drill rotating motor will be held against rotation in the bearing I5 by reason of the pin |40 tting in the groove |48. If the torque on the motor becomes excessive, the motor casing will rotate relative tothe supporting member`|6 `and"-force.the valve member |24 toward its closed position against the action of the `springY |4|. The suppl-y ofiiiuidfor effectingforward feed lwill then be reduced or cut completely off, slowing down or stopping forward feed.

`In order to supply a cleansingliquid to-'fthe drill hole for removing cuttings, there is `pro"- vided, as shown in Figs. 6 and 14, a'lpassage'l vleading from the liquid supply groove 11 to -a boreA |56 containing manually operated `valve' means |51 which controls communication between the passage |55 and a passage |60 opening through the control block 66 into a vpassage '|6If in .the supporting member I6. The passage |6|fis;con nected in communication with a passage 2=|62 formed in a member |64 attached to-thesupporting member, and a tube |55 (Fig-.'39 Yhas'its rear end threaded in-to the passagey |62 vandfex'- tends through an axial opening |66 in'themotor shaft 1 into communication with the vinterior of drill rod l0.

The drill rotating lmotor is supplied withe'lectric current through conductors |68 which pass through an insulating sleeve |60 into aY cham*- ber in the supporting member. The fccnductors |68 extend from the chamber |10 through an insulating sleeve |12 to av chamber '|13 in the control block 60, and, as shown in Fig. 4, a switch |14 in the chamber |13 controls the connection of the conductors to a 'power line,l not shown. The switch is provided with aV plunger which abuts a diaphragml |16 `clamped between a cylinderr member |11l and the control block 66 and forming an end wall of thechamber |13. A plunger |18 is reciprocableinfabore |10 in the cylinder member andabuts the 'oppositeside of the diaphragm. 'FA plunger- |80 v"isireciprocably contained in la bore y| 0| in the cylinder member and has notches |82 which are adapted to receive the outer'end of -theplunger `|18ffo`r position-ing the latter to `eifect an? lopeningr i or closing of the switch |14. The plunger 1|8'0 extends through open ends of the bore |81v so ythat 45 its position may be manually adjusted.

As a result of my invention there is provided a drilling apparatus having improved 'control means. By reason of the arrangement of'th'c'ontrol means in a block which is connectedvto the 50 supporting memberin the manner described, -a ready access to the various controls is hadfor repair or replacement. The controls-are,A furthermore, conveniently locatedv for Iactuation by the drill operator. Y f

sume in practice, it will be understood that 'this' form ofthe same is shown for-purposesofiillustration, and that the invention may bev modified and embodied in various other forms without departing from its spirit or the scope ofthe appended claims.

What I claim as new andrdesire lto'secure by Letters Patent is: y 1. A drilling apparatus comprising'in. combination, a drill rotating motor having ajcasing, means for mounting the casing of rsaid motor for oscillatory movement,v fluid actuated'. feeding means for said motorjmeans inclu'dinga valve member arranged adjacent'the periphery fsaid motor for controlling the supply of. fluid under pressure to said feeding means, and means including an element connected to said motor casing at the periphery thereof and operatively engaging said valve member for positioning the lat- While there is in fthis application speclically ter to regulate fluid supply in accordancewith the load on the motor. f f Y' 2. A drilling apparatus comprising, in combination, a drill rotating motor having a casing, means for mounting the casing of said motor for oscillatory movement, fluid actuated feeding means for said motor, a control block detachably connected to said mounting means and having a valve bore adjacent the periphery of said motor casing, means including a valve member reciprocable -in said valve bore for controlling the supply of fluid under pressure to said feeding means, and means including a pin connected to said motor casing at the periphery thereof and operatively engaging said valve member for positioning the latter to regulate fluid supply in accordance with the load on said ,-motor.

i3. A drilling apparatus comprising, in combination, a drill rotating motor having a casing, means for mounting the casing'of said motor for oscillatory movement, fluid actuated feeding means for said motor connected to'said casing mounting means, a control block detachably connected to said mountingvmeans and removable therefrom while said feeding means remains conknected to said mounting means and having forward and reverse feed passages connected to said feeding means, means including a valve member carried by said control block for controlling the lflow of fluid in said forward feed passage, and

means including a pin connected to said motor casing and 'operatively engaging said valve member for'positioning the latter to regulate fluid supply in accordance with the load on said motor.

4. A drilling apparatus comprising, in combination, a drillY rotating motor having a casing, means for mounting` thecasing of said motor for oscillatory movement, fluid actuated feeding means for said motor connected to said casing mounting means, a control block-detachably connected to said mounting means and having forward and -reverse feed passages connected to said feeding means and itself detachable from said mounting means while said feeding means remains connected lto the latter, valve means carried by said control block for connecting said eforward andreverse feed passages selectively in .communication with fluid supply and discharge,

means including a valve member carried by lsaid control block for controlling the flow of fluid in said forward feed passage, and means including a pin connected to said motor casing and operatively engaging said valve member for positioning the latter Ito regulate fluid supply in accord- V,ance with the load on said motor.

5. A drillingrr apparatus comprising, in comb-ination, a drill rotating-motor having aY casing,

. means for mounting the casing of saidvmotor for oscillatory movement, fluid actuated feeding means for said motor connected to saidcasing mounting means, means for supplying fluidr under pressure to said feeding means, means for supplying cleansing fluid to a drill rotated ,by said drill rotating motor, means for ysupplying operating medium `to the drill rotating motor, 'a conv .trol block connected 'tosaid motorV mounting means and detachable therefrom while saidfeeding means'for said motor remains connected ,to themotor: casing mounting means, means carriedv bysaid control block for controlling the sup-` ply of fluid to said feeding means and toa drill rotated by said drill rotating motor, means carried by the control block for controlling the supply of operating medium to said drill rotating motor, and means connected to said motor casing `and operatively engaging one of said first mentioned control means for regulating the ilow of fluid in accordance with the load on said motor.

Y6. A drilling apparatus comprising, in combination, a drill rotating motor having a casing, means for mountingthe casing of said-motor for oscillatory movement, fluid actuated feeding means for said motor, means for supplying fluid under pressure to lsaid feeding means, means for supplying cleansing fluid to a drill rotated by said drill rotatingfmotor, means for supplying operating medium to the drill rotating motor, a control block detachably connected to said mo- -tor mounting means, valve means for controlling the supply of fluid to said feedingvmeans, Valve means for controlling .the supply of cleansing fluid through said cleansing fluid supply means,

Va switch for controlling the supply of operating medium to said drill rotating motor, each of said valve means and said switch mounted on said control block, and means connected to said motor casing and operatively engaging one of said valve means for regulating the latter in accordance with the load on said motor. o -f f '7. A drilling apparatus comprising, in combination, a drill rotating motor having a casing, means for mounting the casing of said motor for oscillatory movement, fluid actuated ,feeding means for said motor, means for supplying fluid under Vpressure, to said feeding means, means-for supplying cleansing fluid to a drill rotated by said drill rotating motor, means for supplying operating medium to thev drill rotatingmotor, a control block detachably connected to'said motor mounting means, valve means for controlling the supply of fluid lto saidn feeding'means, valve` means for controlling the supply of cleansing fluid through said Y cleansing fluid supply means, a switch lfor controlling the supply of operating medium to said drill rotating motor, each of said valve means and said switch mounted on said control block, and means connected to said motor casing and operatively engaging said first mentioned valve means for regulating the flow of fluid to said feeding means in accordance With the load on said motor. l

8. A drilling apparatus comprising, inY combination, a drill rotating motor v having a casing, means for mounting the casing of said motor for oscillatory movement, fluid actuated feeding means for said motor, means for supplying fluid under pressure to said feeding means, means for supplying cleansing fluid to a drill rotated by said drill rotating motor, means for supplying operating medium to the drill rotating motor, a

. control block detachably connected .to an outer vsurface of Vsaid vmotor mounting means, valve means for controlling the supply of fluid to said feeding means, valve means for controlling the supply of cleansingmedium .through said cleansing fluid supply means and a switch for controlling the supply of operating medium to said drill rotating motor, each of said 'Valve means and said switch mounted on said control block.

' WIN' W. PAGET. 

